/*
    This file is part of the substandard lisp implementation of Standard Lisp
    Copyright (C) 2011 Nicky Nickell

    substandard lisp is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

(de mod (m n)
  (difference m (times n (floor (quotient m (float n))))))

/*---
name: mod

doc: |
  explaining what mod is / how it is used!

tests: |
  (mod 13 4) -> 1
  (mod -13 4) -> 3
  (mod 13 -4) -> -3
  (mod -13 -4) -> -1
...*/
